MESON Chess Problem Database
Problem Display
PID: 239980 (r2rR3/nQ1bPk1p/4RP1b/1p4pP/3N4/1B6/8/3K4 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Parallele 50, 1949
#2
9 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bf8
- 2.exf8Q#
- 2.exf8R#
- 1...Bc6
- 2.exd8S#
- 1...Bxe6
- 2.exd8Q#
- 1...Bc8
- 2.exd8S#
- 1...Bxe8
- 2.Rd6#
- 1...Sc8
- 2.exd8S#
- 1...Bf8
- Tries
- 1.Re1+?
- 1...Kxe8
- 2.f7#
- 1...Be6
- 2.exd8Q#
- 1...Kxf6!
- 1...Kxe8
- 1.Re2+?
- 1...Kxe8
- 2.f7#
- 1...Be6
- 2.exd8Q#
- 1...Kxf6!
- 1...Kxe8
- 1.Re3+?
- 1...Kxe8
- 2.f7#
- 1...Be6
- 2.exd8Q#
- 1...Kxf6!
- 1...Kxe8
- 1.Re4+?
- 1...Kxe8
- 2.f7#
- 1...Be6
- 2.exd8Q#
- 1...Kxf6!
- 1...Kxe8
- 1.Re5+?
- 1...Kxe8
- 2.f7#
- 1...Be6
- 2.exd8Q#
- 1...Kxf6!
- 1...Kxe8
- 1.Ra6+?
- 1...Be6
- 2.exd8Q#
- 1...Kxe8!
- 1...Be6
- 1.Rb6+?
- 1...Be6
- 2.exd8Q#
- 1...Kxe8!
- 1...Be6
- 1.Rc6+?
- 1...Be6
- 2.exd8Q#
- 1...Kxe8!
- 1...Be6
- 1.Rd6+?
- 1...Be6
- 2.exd8Q#
- 1...Kxe8!
- 1...Be6
- 1.Qxd7?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rxe8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 1...Bf8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exf8Q#
- 2.exf8R#
- 1...Rab8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rac8
- 2.Rc6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rdb8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 1...Rdc8
- 2.Rc6#
- 1...Bg7
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Sc6
- 2.Rxc6#
- 2.Rd6#
- 2.exd8S#
- 1...b4
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...g4
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.exd8Q#
- 2.exd8S#
- 2.exd8B#
- 2.exd8R#
- 1...Rxd7!
- threat
- 1.exd8Q?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.R8e7#
- 2.Qe7#
- 2.Qbxd7#
- 2.Qdxd7#
- 1...Bf8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rxf8#
- 1...Rc8
- 2.Rc6#
- 2.R8e7#
- 2.Qe7#
- 2.Qbxd7#
- 2.Qdxd7#
- 1...Sc6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Rxc6#
- 2.Rd6#
- 1...Sc8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 1...Rxd8!
- threat
- 1.exd8B?
- threat
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Qxd7#
- 1...Bf8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 1...Rc8
- 2.Qxd7#
- 1...Sc6
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 1...Sc8
- 2.Re1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 1...Rxd8!
- threat
- 1.exd8R?
- threat
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rxd7#
- 2.R8e7#
- 2.Qxd7#
- 1...Bf8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rxf8#
- 1...Rc8
- 2.Rc6#
- 2.Rxd7#
- 2.R8e7#
- 2.Qxd7#
- 1...Sc6
- 2.Rxc6#
- 2.Rd6#
- 1...Sc8
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 1...Rxd8!
- threat
- 1.Re1+?
- Keys
- 1.Sf5!
- threat
- 2.Sd6#
- 1...Bc6+
- 2.exd8S#
- 1...Bxe6+
- 2.exd8Q#
- 1...Bc8+
- 2.exd8S#
- 1...Bxe8+
- 2.Rd6#
- 1...Kxe8
- 2.Sd6#
- 1...Rxe8
- 2.Sxh6#
- 1...Bf8
- 2.exf8Q#
- 2.exf8R#
- 1...Sc8
- 2.exd8S#
- threat
- 1.Sf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(c);OGATE::PXB(c)=Q
- B(e);P_PINS(C)::PXR(i)=S
- B(e);P_PINS(C),P_SPINB(e),S_CUTR(h),XR(E)::PXR(i)=Q
- B(e);N_GUARD,P_PINS(C),SBLOCK,XR(I)::B(B)+R(E)
- S(d);S_CUTR(h)::PXR(i)=S
- Tries
- Try
- R(E);CHECK
- Vars
- K(f);OGATE,S_FLIGHT,XR(I)::P(F)
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);P-FLIGHT,XP(F)
- Try
- R(E);CHECK
- Vars
- K(f);OGATE,S_FLIGHT,XR(I)::P(F)
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);P-FLIGHT,XP(F)
- Try
- R(E);CHECK
- Vars
- K(f);OGATE,S_FLIGHT,XR(I)::P(F)
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);P-FLIGHT,XP(F)
- Try
- R(E);CHECK
- Vars
- K(f);OGATE,S_FLIGHT,XR(I)::P(F)
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);P-FLIGHT,XP(F)
- Try
- R(E);CHECK
- Vars
- K(f);OGATE,S_FLIGHT,XR(I)::P(F)
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);P-FLIGHT,XP(F)
- Try
- R(E);CHECK
- Vars
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);S_FLIGHT,XR(I)
- Try
- R(E);CHECK
- Vars
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);S_FLIGHT,XR(I)
- Try
- R(E);CHECK
- Vars
- B(e);P_PINS(C),P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);S_FLIGHT,XR(I)
- Try
- R(E);CHECK
- Vars
- B(e);P_SPINB(e)::PXR(i)=Q
- Refutation
- K(f);S_FLIGHT,XR(I)
- Try
- Q(G);XB(e)
- Threat
- DUALS(8)
- Vars
- R(i);::B(B)+R(E)
- Refutation
- R(i);P_PINS(C),XQ(G)
- Try
- P(H);P_PINB(e),XR(i)
- Threat
- DUALS(13)
- Refutation
- R(h);XQ(H)
- Try
- P(H);P_PINB(e),XR(i)
- Threat
- DUALS(6)
- Vars
- R(h);::QAR2(G),XB(e)
- Refutation
- R(h);XB(H)
- Try
- P(H);P_PINB(e),XR(i)
- Threat
- DUALS(7)
- Refutation
- R(h);XR(H)
- Try
- Actual
- S(C);
- Threat
- S(C)
- Vars
- B(e);CHECK::PXR(i)=S
- B(e);CHECK,P_SPINB(e),S_CUTR(h),XR(E)::PXR(i)=Q
- B(e);CHECK,N_GUARD,SBLOCK,XR(I)::B(B)+R(E)
- K(f);S_FLIGHT,XR(I)::S(C)
- R(i);SBLOCK,XR(I)::S(C),XB(c)
- B(c);OGATE::PXB(c)=Q
- S(d);S_CUTR(h)::PXR(i)=S
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).